The only fun fact I remember about Lagrange Points is when I first heard of them with JWST I figured someone really smart must have used a supercomputer in recent history to calculate such a thing.

Nope. Someone in freaking -1750- figured them out (okay 1770 it was furthered)

No electricity, telescopes primitive at only 100 years old, barely grasping the idea of a solar system and they are doing that level math by hand.

https://en.wikipedia.org/wiki/Lagrange_point